[maemo-developers] n810: Light Sensor (?)

[From: Igor Stoppa]

On Mon, 2008-01-14 at 13:59 +0200, ext Marius Gedminas wrote:
> On Sun, Jan 13, 2008 at 01:32:26AM +0000, Neil MacLeod wrote:
> > Deleting or renaming /usr/lib/mce/modules/libfilter-brightness-als.so
> > (and rebooting) is an effective way to stop the light sensor from
> > randomly and inappropriately changing the display brightness[1] even
> > in a well lit environment.
> > 
> > It might be worth perusing the source code for the aforementioned
> > library in order to glean any useful tidbits (assuming it hasn't been
> > retained as closed source).
> 
> I tend to assume that anything developed by Nokia is closed-source,
> unless they started from an existing GPL project to save money and
> therefore can't close it.


iirc this was taken from some phone product, to save time (yes, that's
arguable but it's not the point here) and therefore it's considered not
viable for opening.

I strongly suspect that if you just check the website of some
manufacturer of ALS devices, you'll probably get some demo algorythm to
do the filtering, likely similar to the one we are using.

-- 
Cheers, Igor

Igor Stoppa <igor.stoppa at nokia.com>
(Nokia Multimedia - CP - OSSO / Helsinki, Finland)